#include "my_stdio.h"
#include<stdio.h>
int main()
{
    M_FILE* fp = mfopen("./log.txt","w");
    printf("文件描述符：%d,缓冲区容量:%d,缓冲区元素个数:%d",fp->fileno,fp->cap,fp->size);
    return 0;

}
